Fibre-Optic Impact Damage Detection Of Composite Materials

1988 ◽  
Author(s):  
R. M. Measures ◽  
N. D. W. Glossop ◽  
J. Lymer ◽  
S. Dubois ◽  
W. Tsaw ◽  
...  
Keyword(s):  
Composite Materials ◽  
Damage Detection ◽  
Impact Damage ◽  
Fibre Optic

Factors Influencing Acousto-Ultrasonic Approach to Impact Damage in Composite Materials

2011 ◽  
Vol 393-395 ◽  
pp. 97-101
Author(s):  
Huan Ping Kong ◽  
Zheng Zhang ◽  
Li Fei Li
Keyword(s):  
Composite Materials ◽  
Damage Detection ◽  
Rapid Detection ◽  
Impact Damage ◽  
Low Frequency ◽  
Factors Influencing ◽  
Frequency Transducer ◽  
Ultrasonic Parameters ◽  
Early Damage

This paper studied factors influencing AU detection results on different damage specimens, including simulation frequency, transducer modes and transducer location. Correlation between acousto-ultrasonic parameters (AUP1, AUP2) and impact damage severity in composite was investigated. The results showed that as damage severity increased, AUP1 and AUP2 of three different transducers decreased. Applying low frequency transducer, the variation of AUP1 may indicate a more rapid detection prospect. In addition, applying S1-transducer and WD-transducer, AUP2 was more effective for the early damage detection. Varying transducer’s location, S1-transducer applying 500khz simulation frequency presented a valuable results.

scholarly journals Structural Health Monitoring in Composite Structures: A Comprehensive Review

Sensors ◽  
2021 ◽  
Vol 22 (1) ◽  
pp. 153
Author(s):  
Sahar Hassani ◽  
Mohsen Mousavi ◽  
Amir H. Gandomi
Keyword(s):  
Composite Materials ◽  
Structural Health Monitoring ◽  
Damage Detection ◽  
Health Monitoring ◽  
Composite Structures ◽  
Impact Damage ◽  
Detection Methods ◽  
Comprehensive Review ◽  
Structural Health ◽  
Acoustic Modulation

This study presents a comprehensive review of the history of research and development of different damage-detection methods in the realm of composite structures. Different fields of engineering, such as mechanical, architectural, civil, and aerospace engineering, benefit excellent mechanical properties of composite materials. Due to their heterogeneous nature, composite materials can suffer from several complex nonlinear damage modes, including impact damage, delamination, matrix crack, fiber breakage, and voids. Therefore, early damage detection of composite structures can help avoid catastrophic events and tragic consequences, such as airplane crashes, further demanding the development of robust structural health monitoring (SHM) algorithms. This study first reviews different non-destructive damage testing techniques, then investigates vibration-based damage-detection methods along with their respective pros and cons, and concludes with a thorough discussion of a nonlinear hybrid method termed the Vibro-Acoustic Modulation technique. Advanced signal processing, machine learning, and deep learning have been widely employed for solving damage-detection problems of composite structures. Therefore, all of these methods have been fully studied. Considering the wide use of a new generation of smart composites in different applications, a section is dedicated to these materials. At the end of this paper, some final remarks and suggestions for future work are presented.

Investigation of the mechanical and forming behaviour of 3D warp interlock carbon woven fabrics for complex shape of composite material

2021 ◽  
pp. 152808372098410
Author(s):  
Mehmet Korkmaz ◽  
Ayşe Okur ◽  
Ahmad Rashed Labanieh ◽  
François Boussu
Keyword(s):  
Composite Materials ◽  
Complex Shape ◽  
Impact Damage ◽  
Woven Fabrics ◽  
Forming Process ◽  
Warp Yarn ◽  
Delamination Resistance ◽  
Fabric Architecture ◽  
Weave Pattern ◽  
Carbon Fabrics

Composite materials which are reinforced with 3D warp interlock fabrics have outstanding mechanical properties such as higher delamination resistance, ballistic damage resistance and impact damage tolerance by means of their improved structural properties. Textile reinforcements are exposed to large deformations in the production stage of composite materials which have complex shape. Although good formability properties of 3D warp interlock fabrics in forming process were already proven by recent studies, further information is needed to elucidate forming behaviours of multi-layer fabrics which is produced with high stiffness yarns like carbon. In this study, 3D warp interlock carbon fabrics were produced on a prototype weaving loom and the same carbon yarn was used in two fabric directions with equal number of yarn densities. Fabrics were differentiated with regard to the presence of stuffer warp yarn, weave pattern and parameters of binding warp yarn which are angle and depth. Therefore, the effect of fabric architecture on the mechanical and formability properties of 3D warp interlock carbon fabrics could be clarified. Three different breaking behaviours of fabrics were detected and they were correlated with crimp percentages of yarn groups. In addition, the bending and shear deformations were analysed in view of parameters of fabric architectures. Two distinct forming behaviours of fabrics were determined according to the distribution of deformation areas on fabrics. Moreover, the optimal structure was identified for forming process considering the fabric architecture.

Development of high-speed optical wavelength interrogation system for damage detection in composite materials

2005 ◽  
Author(s):  
Shinji Komatsuzaki ◽  
Seiji Kojima ◽  
Akihito Hongo ◽  
Nobuo Takeda ◽  
Takeo Sakurai
Keyword(s):  
Composite Materials ◽  
Damage Detection ◽  
High Speed ◽  
Optical Wavelength
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